The slope formula is:

First, let's solve the slope for Line 1.
a. Subtract y₁ from y₂.

b. Subtract x₁ from x₂.

c. Divide the result in step a by the result in step b.

Hence, the slope of Line 1 is -5.
Let's now solve the slope of Line 2. Use the same steps above.
a. Subtract y₁ from y₂.

b. Subtract x₁ from x₂.

c. Divide the result in step a by the result in step b.

Hence, the slope of Line 2 is 5.